The Upper West Side isn’t the only place where fed-up New Yorkers are turning to private security guards to deal with the city’s spiraling homelessness crisis.

Zeckendorf Towers at Union Square has a single guard patrolling around the complex from 7 p.m. to 3 a.m. daily to roust vagrants and keep them from camping out on the sidewalks.

One longtime resident called the change “amazing,” saying, “The main problem was the outside of the Food Emporium on 14th Street between Park and Irving.

“Now that they’ve hired private security, it’s been much, much better,” said the woman.

She added, “The homeless problem in Union Square since [Mayor] de Blasio came into office has been absolutely awful.”

A Food Emporium manager also said, “I was wondering why there were so fewer homeless people lately.”

“Then I found out we had private security, and I was like, finally!” the manager added.

Last week, The Post revealed that residents of 12 Upper West Side buildings were paying a total of $140,000 a year — $120 apiece per month — for a guard to patrol the four square blocks that surround a controversial new shelter at 306 W. 94th St. every day from evening until early morning.

One guard, who requested anonymity, said the company was hired because a vagrant was found dead at 15th Street and Union Square East, “and ever since that night, they don’t want another thing like it.”

Schissel wouldn’t say how much his company was being paid, and the Zeckendorf’s management company, Maxwell-Kates, declined to comment.

Meanwhile, City Hall said Sunday that a guard at the 94th Street shelter had been fired in the wake of an exclusive Post report that revealed how a holdout rental tenant in the building shot cellphone video showing the guard sleeping on the job.

Spokeswoman Jaclyn Rothenberg also insisted that de Blasio “has put forward the most aggressive homeless plan than any other mayor” and was “turning the tide on this decades-old challenge.”